COOPERATIVE FREIGHT CAR TRUCK AND SNUBBER RESEARCH PROGRAM
This item consists of the conclusions and four appended reports to MR114. It was found that in trucks with all-coil springs without snubbers, the best performance was obtained with 1 5/8" spring travel. All snubbing devices tested provided definite improvement in riding quality over that provided by unsnubbed springs. None of the fifteen Unit Snubbers tested provides performance considered satisfactory to a speed of 65 mph. Five of the eleven Package Snubbers tested provide performance considered satisfactory ("fair") to a speed of 90 mph. Two of the three Modified Conventional Trucks tested provide performance considered satisfactory ("fair") to a speed of 90 mph. These two trucks are as follows: HOLLAND RS-8 with 2 1/2" springs and HOLLAND RS-8 with CESD springs. Twenty-eight of the thirty-five High-Speed Trucks tested provided performance considered satisfactory to a speed of 90 mph. The appendices includes reports of studies on the performance of solid-type journal bearings, roller bearing research, lateral action of freight car trucks and accelerometer performance and side frame stress.
- First 12 pages of report missing.
Association of American Railroads50 F Street, NW
Washington, DC United States 20001-1564
- Publication Date: 1951-6-30
- Features: Figures; Tables;
- Pagination: 13 p.
- TRT Terms: Acceleration (Mechanics); Bearings; Freight cars; Journal boxes; Motor vehicle bodies; Railroad cars; Ride quality; Snubbers; Spring; Stresses; Suspensions; Technology; Trucks; Vehicle design; Vehicle dynamics
- Uncontrolled Terms: Lateral dynamics
- Geographic Terms: United States
- Old TRIS Terms: Car body
- Subject Areas: Design; Motor Carriers; Railroads;
- Accession Number: 00040244
- Record Type: Publication
- Report/Paper Numbers: AAR MR-114
- Files: TRIS
- Created Date: Jul 8 1994 12:00AM